Electric gear-shifting mechanism



F. H. GIBSON. ELECTRIC GEAR SHIFTING MECHANSM. APPLICATION FILEDMAR.25,1912.

Patented 001524,1922.

2 SHEETS-SHEET l.

F. H. GIBSON.

ELECTRIC GEAR SHIFTING M-ECHANISM. APPLICATION FILED- MAR. 25. 1912.

mmm

Patented oct. 24,1922;

2 SHEETS-SHEET 2.

.Patented '@ct.'

.application llez March Q5, 1915?.. Serial No.

To all whom t may concern: Be it known that l, Fern Hanoio Grinsen, acitizen of the rUnited States, residing at Y the city and county of SanFrancisco, and

Ciii

State of California, have invented new and useful Improvements inElectric Gear-Shifting Mechanism, of which the following is aspecification.

This invention relates to an electrically controlled gear shiftingmechanism, andparticularly pertains to a mechanism for controlling andoperating the change speeds.

or transmission gears of automobiles and the like. A

It is the object of this invention to 'provide a means for shiftingtransmission gears, such as are employed in automobiles and similarself-propelled vehicles, between the engine shaft and the propellershaft for changing the speed of, or reversing the propeller shaft, andwhich invention is designed to do away with the use of the usual handlever now commonly employed for that purpose. Another object is toprovide means for shifting the transmission gears on the operation ofthe usual clutch arranged between the engine and the transmission, 'andto provide an electrical mechanism for selecting the various gears inthe transmission and connecting them to the shifting mechanism by themanipulation of a switch mechanism disposed on the steering wheel orother convenient portion of the vehicle. A further obiect is to providea gear shifting mechanism of the above character, which is simple inconstruction, efiicient in 'operation, and which is adapted to beapplied to most automobiles and other vehicles in whichA the selectivetype of transmission is em-A p loyed.

he invention consists of the parts, and the combination and constructionof parte as hereinafter more fully described and claimed, havingreference tothe accompany ing drawings, in which-,-

Fig. 1 is a. diagram illustrating the application of the A-invention tothe transmission mechanism of an automobile, showing the latter inelevation.

Fig. 2 is a diagrammatic plan View showing the electrical ap aratus. I

Fig. 3 is a vertice Section of the selective switch mechanism.

Fig. 4 is a plan view vof the gear shifting device.-

Fig. 5 is a vertical section on t 'idf-4W of Fig.

F 6 is a vertical section on X-X, of Fig. 4 F ig. 7 is a verticalsection on the if-Y of Fig. t.

Fig. 8 is a detail sectional view of a deter.

ln the drawings, A represents an engine shaft having a fly-wheel Bthereon, and 2 indicates a clutch member mounted on a shaft 3 extendinginto a 'transmission gear-case 4, and which clutch member is designed tobe thrown in and out of engagement with the fly-wheel B to rotate theshaft 3 from the engine shaft A. The clutch member ,2 is normally heldin engagement with the fly wheel B by means of a helical spring 5 woundon the shaft 3 and bearing between the case e and a grooved hub on theclutch member 2. A foot-lever 6, pivoted at 7, is arranged with itslower end engaging the hub on the clutch member 2 and is provided as ameans for throwing the clutch member 2 ont of engagement with theflywheel B in opposition to the spring 5, in the'manner common inautomobile construction.

Mounted in the case i is a propeller shaft 8 and counter-shaft 9; thelatter having gears orf-o o and d keyed thereon and the former havinggears e and f mounted to slide longitudinally on a squared portionthereof.

A pinion h'on the 'drive-shaft 3 is meshed with the gear a in suchmanneras to rotate the counter-shaft 9 continuously when the drive shaft3 is revolved, but at a less speed ,than the latter. The propeller shaft8 is-disposed in alignment with the drive-shaft 8 and is designed to beconnected directly therewith, so as to be rotated in unison with thedrive shaft, by means of laterally extending teeth c' on the gear e,which are eugageable with similar teeth :j on the pinion h. rThe gear yeis designed-to be shifted on the propeller shaft 8 in either directionso as to dispose it in any one of three positions, namely,.with theteeth i meshing with the teeth jon the pinion h for direct drive, orwiththe teeth on its periphery meshing with the gear b, to drive thepropeller'shaft 8 through thecounter-shaft 9,'at any intermediate speed,or in a neutral position out of mesh with the gear b and with the teethi out of 4engagement with the teeth j, so that no motion will be giventhe shaft 8 therethrough.

The gear j is slidable on the propeller shaft 8, vindependentv of thegear e and is designed to be thrown in and out of mesh with the gear cand yin and out of mesh with an idler-gearv meshed with the gear d; thegear f being positioned between the gears c and ai when it ishintendedto be inoperative. When the gear f is in. mesh with the gear c, thepropeller shaft 8 will be rotated from the counter-shaft 9 at slow speedand when it meshes with the idlergear la its direction of rotation willbe reversed. l The foregoing described apparatus constitutes thewell-known clutch and selective transmission mechanism commonly employedin self-propelled vehicles, and operates in the usual well-known mannerto startl and stop the vehicle. vary its speed, and change its directionof travel.

The essence of this invention resides in a mechanism for shifting thegears e and f by the action of the spring 5 in throw'in @lll the clutchmember 2 unto engagement wit i the fly-wheel B after the clutch memberhas been thrown out of engagement with the fly-wheel by means of thefoot-lever 6. This mechanism comprises a pair of reciprocally mountedbars 10-10 which are connected to grooved hubs formed yon the,

gears; e and f, by means of yokes ll-ll, respectively; reciprocalcarriages 12-12 operated by means of the foot-lever 6, and electricallyoperated means for connecting the carriages tothe bars.

'llhev bars 10--10 are here shown as mounted in a guide frame 13,disposed adjacent thecase e, and are designed to be reeiprocatedhorizontally in the guide frame 13 in a longitudinal direction, as willbe .later described; the carriages 12-12 being also mounted in the guideframe 13 to reciprocate parallel to the bars 10--10 in clos'e proximitythereto.

The carriages 12-12 are reciprocated in opposite directions in relationto each other by means of a lever 14 which is pivoted at 15 to swinghorizontally on a post 16, mounted onthe guide-trame 13; the lever 14:being connected to the carriages 12-12 on opy posite sides ol itspivotal mounting 15,`by

`means of links 17-17 which are lvotally connected at their inner endsto t e lever 14 andat their outer ends to standards on the carriages12--12, as particularly shown in Figs. e and 6.

@ne end or" the lever 14e is extended beyond its connection with thelink 17 and is pivotally attached to a connecting rod 1S,

the opposite end of which is pivotallv connected to the upper end of avertically disposed lever 19, pivoted at 2O on a bracket 21, or othersuitable support. The lower end or 'the lever 19 is connected to thelower portion ot 'the 'toot-lever 6 means of a 4disposed in a suitablecase which link 22, in such manner that when the footlever 6 is operatedto throw the crutch ineinber 2 out of engagement with the y-wheel B, thelever 19 will be rocked-on its pivot 20 to actuatethe lever 14 in suchdirection as to move the carriages 12 and 12 inwardly toward eac-hother, and to move the carriages 12 and 12 outwardly when the clutchmember` 2 is thrown into engagement with the fly-wheel B by means ofvthe spring 5.

Means are provided for connecting either end of the bars 10410 to thecarriages l2-`12, when the latter are in their innermost positions, soas to cause the bars 10-10 to move outwardly with the carriages 12 and12, as occasion may require.

This means is here shown as consisting of horizontally extending ironblocks l23 mounted in recesses 24 formed in the upper `faces of the bars10 to 10" adjacent to theirA outer ends, as particularly shown inv Figs.

in the bars 10 and 10,'a nd`mountedon the carriages 12 and 12 is aseries of vertically disposed electro-magnets, indicated at Z, m, n. ando, one of which magnets is disposed over each of the recesses 26 withits core 27 extending into the recesses, as shown in Figsand 7. v

The electro-magnets, Z, m, n and o are designed to be energized when thecarriages 12 and 12 arel disposed in theirinnermost positions so as tocause the cores 27 thereof to act on the iron blocks 23; (the latterforming armatures), in such manner as to cause the blocks 23 to enterthe recesses 26 in the. carriages 12 and 12 and thereby form aconnection between the carriages 12 and `12" and the barslO and 10', sothat when the former are movedoutward the latter will be caused to movein unison therewith.

@ne terminal of each of the .magnets Z, m, 'n and o connects with aconductor p, which in turn connects with one terminal of a battery gthrough a pair of contact members -r and s, which contactmembers lorm aswitch for making and breaking a circuit through the conductor p. aswill be later described. The other terminals of 'the magnets Z, m, a ando connect with conductors t, a, n w, respectively, which .lead to aseries ci? contact me llO erably mounted on a steering wheel C, but

which may be disposed at any other-point convenient to 'the operator.The contact members m are designed to be thrown into contact withcontact plates y which are electrically connected to a conductor .eleading to the other terminal of the battery g, so as to complete acircuit through the electrobers magnets Z, m, f/tor o, as may bedesired.

The contact members :l: are normally out of contact with the contactplates y and may be thrown into contact therewith. in any suitable.manner. .The mechanism here shown for that pur ose consists of Aa seriesof push-buttons i'ndlcated at 29, 30, 31 and 32, which are mounted onthe upperends of -vertically reciprocable stems 33 mounted in the casing28. The stems'33 carry taperedlshoulders 34, the inclined faces ofwhich. are

adapted to contact the upper ends of the sprlng Contact membersasparticularly shown in Fig. 3, in Such manner that when the stems 33are depressed, by the operation of the push buttonl thereon, the taperedshoulders will act -to press the contact memplates y.

Helical springs 34 arev woundl on the stems 33 below the taperedshoulders 34 and bear in an upwardly direction on the. stems 33 so as tonormally retain them' intheir uppermost positions. Means arepro-`- vided'for retaining the stems 33 -in their lowermost positions in oppositionto the sprin v34', so as to indicate which of the buttonsr'29, 30, 31 or32was'last depressed. This means is h .ereshown as consisting of 'ahorizontally reciprocable plate 35, mount- .ed` in the casing 28 andprovided with a series of elongated perforations 36 through which thestems 33 extend; the plate 35 being normall disposed in such positionthat.

one end of t e slots 36 willcontact the stems 33; a spring 37 beingattached to one. end of the plate 35 and exerting a pull upon thelatterto normally retain it in the position shown 'in Fig..3.

Mounted on each of the stems 33 are flangesv 38, which are normally disosed above the plate 35, the flanges 38 eing beveled on theirunder-sides in such manner that when the stem 33 is. depressed, the

beveled face of the 4flange therein bears against the endof a slot136,and will act to force' the plate 35 backwardly in opposi-l tion tothespring 37and allow the shoulder 38 to pass to the underside of ythe.plate 35. The spring 37 will now act'to restore the plate 35 to itsVnormal position above the flange 38 on the depressed stem 33 therebylockin the stem in its lowermost position,

as indlcated in .dotted lines in Fig. 3. When theplate 35 isreciprocated by .the depressionl of any of the stems' 33, the stempreviously` depressed will be released and caused outwardly 'intocontact with the double-acting helical springs 39, arranged to act'onthebar 10f and members 40 on the carriages 12 and 1 2', which arejadaptedto act on the bar 10 to restore it to its normal position when thecarriages 12". and 12 are retracted. rlhe springs 39 bear between theguide frame 13 and-projections 41 carried on ,the underside of the' bar10', as

shown in Figf, in such manner as to normally hold'the bar 10 in itscentral position.

Spring detents 42, of any suitable description, aremounted on the guideframe 13 and are designed to engage sockets or grooves 42 formed on the.undersidesof the bars 10 -and -10 in suchmanner as toinsure the bars 10and A10 coming to a stop in the proper position, at their most polnts.j

When `the transmission gears e and fare innermost and outerand the'clutch7 member@ isin engagement with the y-wheel B,`as shown in k' ig.l, the bars 10 and 10 will be in their central posi. tion and thecarriages 12 and, 12 will be in their outermost positions, as shown infull lines iii-Figs 4, 5,31 and .7. "When it is'de'sired to drive lthevehicle on the slow vspeed, 'the gear,` f4 on the propeller shaft 8 isthrown into mesh with the gear c' on' the counter-shaft 9. This. isaccomin their normal or intermediate positions l plished by irstthrowing v'the' clutch member 2 out of engagement with'the ily-wheel Bby the depressionof-the foot-lever 6 in the direction .of the arrowthereon in Fig. 1,'wh1ch action moves the clutch member 2 ina rearward.direction and causes the v contact member r, which 'is carried on thehub ofthe clutch member -2, to come .into contact with Athe contactmember s, so as to permit of the assage' of the. electrical currentthrough t e conductor p when any of lthe push-buttions 29,30, 31 or 32is depressed. lThe Amoment."tl1'e clutch member 2is thrown out ofengagement with the fly-wheel B the pushbutton 31 is depressed soas tocompletea circuit from the battery g, through the 'conductors 'z and o,electro-magnetn,

and ,conductor p to energize the electroma et n. v l

he carriage 12 on which the electrokmagnet n; is mounted, beingpreviously moved to its rearmost position by the rearward movement of"the lower portion of the lever 3 acting through thelink'22, lever 29,connecting-rod 18, lever 14, and .link 17, the

-core 27 of the electro-magnet n, will be positioned over the iron block23 in the recess 24 adjacent to the left end of the bar 10.

The energization of the magnet n causes the iron block 23 to move upwardinto the .recess 26 thereabove inthe carriage 12 so that when the lattermoves outward, which occurs'when thefoot-lever 6 is released, andv thespring restores the clutch 2into engagement with the iiy-wheelB, seas tomove Y ythe bar outward in unison with the car riageAv 12 in suchdirection as to 'move the earf into engagement with the vgear c. Thelbar10 will remain in its outermost position to hold the gear f in mesh withthe gear c as long as the carriage 12 lis retained in vits outermostposition..

When it is desired to throw the gear? f out of engagement with the gearc and throw it'into engagement with the idler gear c to reverse thedirection of rotation of the propellerl shaft 8., the .clutch member 2is thrown out of engagement with the fly-wheel B' by the operation ofVthe foot-lever' 6, as before I described, therebyretracting thevcarriages i 12 and 12. and restoring normal or central position; thebar 10 being the bar 10 to its moved back-to its central position bymeans of the enga ing member 40.0n` the carriage 1.2 which w1 l engagethe end of the bar 10 l so as to cause theflatter to move back in IA`magnet 0..' This action locks the bar-10`to thecarriage "12'y sotlia-t`. when the latter is movedy outward, on the release of thefootlever 6, :and by the action ofx-thespring 5',

it restores the clutch 2y into `enga ement with the fly-wheel B so asftoInbve t le gear f to the right into engagement withy the idler 'gear-lcwhere it remalns during the time the carriage 12 is retained in 1tsoutermost position. v

From the foregoing it will be seen that whenever the bar '10 is in itsoutermost position in'either direction thev gear f will be in mesh witheither the gear c or the idler gear 7c, and when the carriages '12 Vand12 are moved inwardly in readiness to operate either the bar 10 or `1()F and the gears and e connected therewith, the bar 10`w11l be restoredto its normal position so as to position the gear f in its .intermediateposition before another shifting operation of the transmission gears canbe accomplished.

Means are provided for retaining the bar 10' in such position as to holdthe teeth z' in constantmesh with the teeth j, irrespective oftheoperation of the carriages 12 and 12",'so that the clutc-h 2 may bethrown in' and out at will without disconnecting the propeller shaft 8fromthe `driveshaft 3. This is accomplished by. means of a block 43,pivotally mounted at one end in a recess 44 formed in the frame 13. Theblock 43.normally rests vupon the upper face of the bar 10 and isdesigned togravitate into a recemv 45 formed in the bar 10* when thelatter is in the outermost positin Yassumed -when the teeth i are inengagement with the teeth j; the` outer end of the block 43 en- 75gaging one end of the slot or 1recess 45 to Y hold the bar .10 againstretraction, in opposition to the springs 39.l v

When the bar 10'1-is thus engaged the carria s 12 and 12 maybereciprocated at wil without eEec-ting the bar 10, thus permitting theoperator to throw the clutch 2 in' and out of engagement with theilywheel B, as desired, when-the vehicle is being driven at the highspeed.

Means are provided for automatically throwing the block 13 out ofengagement with the bar 10 when any one of the electromagnets m, n or oareenergized, preparatory to shifting either of the gears e or 90 intothe slow speed, intermediate speed, or reverse position, so that the bar10, lwillbe restored toits normal central position by means of thesprings 39when the carriages 12 and l2xare in their retracted positions.

This means is'y here shown as consisting of a series of electromagnetsu', @'and w', which arev mounted 4`on the guide' -rame 13 and arepositioned in alignment with their cores extending into therec'ess l5'inwhich 100 -theblock 43 is mounted, andin such position that when any oneof the electro-magnets u', .11 -or' w is energized the block 43 will bedrawn mto the. recess i5 out of engagement with the bar 10, therebypermittingthe'lab' 105.

ter vto be restored to its normal position by the action of thesprings-39. The energization of the magnets u','-fvand 'w' isaccomplished by the depression of any one of the buttons 30, 3l or 32;one terminal of each 11o of the magnets u', Iv", and lw. connecting withthe conducto-rs u, fb, and 'w respectively and the other terminal ofeach of the magnets u',- 'v and 'w' connecting with the conductor pleading from the battery g.

It will be'seen when the bar 10. is in its outermost position and theblock 4:3 is engaged therewith that when any one of the magnets u, e orrw is energized by the depression of any one of the buttons 30 31 120 or32, the block 43 .will be drawn out of en gagement .with the bar 10,providing the clutch 2 is previously thrownpout of engagement with thefly-wheel B so as to throw the contact member 1" into contact 125 withthe contact member s.

The contact members r and .s form a make and break or switch device bymeans of which the conductor p will be broken when rthe clutch 2 is inits engaged position, there- 130 by preventing the flow ofV current'through the various conductors and magnets should any of the4push-buttons 29, 30, 31 or 32 be operated while the clutch is in its.engaged position; the various magnets 1,7m, n, and 0.`

u', fv, and fw being capable of being energized only vwhen the clutch l2is in. its disen aged position.

y providing a means for holding the push-buttons 29, 30, 31 and 32amtheir depressedpositions, the operatorA is enabled to determine which ofthe vmagnets Z, m, fn' or o was last energized, thereby indicating thepositionslof .the transmission gears e and f.

Means are provided for lpreventing the iron blocks 23 from beingretracted into the recesses 24' and thereby become disengaged from thecarriages 12-'12 when the magnets Z, m, n and -o are ds-energized, whichoccurs when the clutch 2 is restored to its normal engagement with thefly-wheell B;

This means consists of a horizontally "extending flange or projection 23on the outer end of each of the blocks 23. which is adapted to extendoverand be engaged by al similar flange 26-formed on the carriages 12-12and extending into the recesses 26' therein.

From the foregoing it will be seen that l have provided a mechanism forcontrolling the shifting o f lthe. transmission `gears in self-propelledvehicles, -which obviates the use of handleversor similar devices and inwhich the shifting of the` gears is accomplished by means of thespring 5which normally retains the clutch 2 in its engaged position with the'fly-wheel B. Havin what laim'and desire to secure by LettersPatentis- 1. The combination with a clutch-operating mechanism, of areciprocable member connected'withand'operable by said mechanism,l ashiilable` gear, and electricallycontrolled -mea "s for connecting saidreciprocable meznbei` `to the position thereof.

2. rlhe combination with a` gear shifting mechanism having a shiftablegear, and a clutch-operating mechanism, of electricallycontrolled meansfor connecting said clutchgear to shift the operating mechanism andVsaid shiftable gearwhereby the latter may be shifted by the o erationofthe former.

3. 'n a mechanism, the combination of a drive shaft and a driven shaft,a countersh'aft in constant drive connection with the driven shaft, apropeller shaft, inter-engageable lgears on the driven, counter and proeller shaft, a clutch between the drlve sha and driven shaft, means foroperating the clutch, means actuated by the clutchoperating means'forshifting the gears and meansl for selectively connecting the gear nism.o erative.

thus described my l inventiom,l

shifting means with the clutch-operating means.

4. In a device of the class described, the combination of a drive-shaftand ai driven shaft, a `countershaft in constant drive connection withthe driven shaft, apropeller shaft, inter-engageable ,gears on thedriven counter, and propeller shafts, a" clutch between the drive-shaftand the driven shaft, means for operating the clutch, normallyinoperative mechanism for shifting the j gears bysaid clutch-operatingmeans, and electrical means for 5. T e combination with a series ofgears,

A infcluding a shiftable gear, a clutch, means for operating saidclutch, electrically-controlled means for shifting the shiftable gearoperated byl the clutch-operating means, including a reciprocable'member attached to the -gear, areciprocable member attached to theclutch-operating' mechanism, and

v means operatedby' an electric current for gether.

6. The combination with a series of gears,

connecting said reciprocable members torendering said mechaincluding ashiftable. gear, a clutch, means for operating said clutch,electrically-conl trolled means for shifting the shiftable gear.operated by the clutch-operatingmeans, in-

cluding a reciprocable member attached to the gear, a reciprocablemember attached to the clutch-operating mechanism, means oper-A 'I atedby an electric current for connecting said reciprocable members'together, and switch mechanism operated by the clutch for breaking theelectric current.

7. The combination with a series of gears, i'

including a shiftable gear, a clutch, means f or operating said clutch,electrically-controlled means for'shifting theshiftable vgear operatedby" the clutch-operating means, in-

cluding a reciprocable member attached to the ear, a reciprocablefmemberattached to' the c utch-operating mechanism, means oper- .ated by anelectric current for connecting said reciprocable members together,comprisreciprocable members, armatures on the other of said members,'and push-button means for.` controlling the energizetion of the.'

electro-magnets.

a series of electro-magnets. on oneof rec i'.

9. The combination with a series of gears, including a shi'ftable gear,a clutch, means for operating said clutch, electrically-controlled meansfor shitting the shiftable gear operated by the clutch-operating means,including a reciprocable member attached to the gear, a reciprocablemember attached to the clutch-operating mechanism, means operated by anelectric current 'for connecting said reciprocable members together,comprisin a series ot electro-magnets on one of said reciprocablemembers, armatures on the other ot said members, push-button means forcontrolling the energization of the electro-magnets, and meanswherebythe energization of a magnet will cause the armature on one ot'the reciprocable members to engage the other reciprocable member.

10. The combination with a series of gears, including a shiftable gear,a clutch, means lfor operating said clutch, electrically-controlledmeans tor shitting the shiftable gear operated by the clutch-operatingmeans, including a reciprocable member attached to the gear, areciprocable member attached to the clutch-operating mechanism, meansoperated by an electric current for connecting said reciprocable memberstogether, comprising a series ot electro-magnets on one ot saidreciprocable members, armatures -on the other ot said members,push-button means for controlling the energization of theelectro-magnets, and means whereby the energi'zation of a magnet willcause the armature on one of the reciprocable members to engage theother reciprocable member so that when the clutch is operated in onedirection to move the reciprocable member connected therewith thereciprocable member attached to the gear will move in unison therewith.

ll. The combination with a series ot gears, including a shittable gear,a clutch, means tor operating said clutch, electricallycontrolled meanstor shifting the shiftable gear operated by the clutch-operating means,including a reeiprocable member attached` to the gear, a reciprocablemember attached to the clutch-operating mechanism, means operated by anelectric current 'for connecting said reciprocable members to-l gether,comprising a series of electro-magnets on one ot said reciprocablemembers, armatures on the other ot sald members,

`push-button means for controlling the energization oit theelectro-magnets, means whereby the energization of a magnet will causethe armature on one ot the reciprocable members to engage the otherreciprocable member so that when the clutch is operated in one directionto move the reciprocable member connected therewith the reciprocablemember attached to the gear will move in unison therewith, andmechanical means for restoring the gear shitting mechanism to its normalposition.

12. rlhe combination with a series of gears, includingl a shiftablegear, a clutch, means for operating-said clutch, electricallycontrolledmeans for shifting the shittable gear operated by the clutch-operatingmeans, including a reciprocable member attached to the gear, areciprocable member attached to the clutch-operating mechanism, meansoperated byan electric current for connecting said reciprocable memberstogether, comprising a series ot' electro-magnets on one ot saidreciprocable members, armatures on the other of said members,push-button means for controlling the energization of theelectro-magnets, means whereby the energization of a magnet will causethe armature on one ot the reciprocable members to engage the otherreciprocable member so that when the clutch is operated in one directionto move the reciprocable member` connected therewith the reciprocablemember attached to the gear will move in unison therewith, mechanicalmeans for restoring the gear shifting mechanism to its normal position,and means tor controlling the electric current to the electro-magnets bythe operation of the clutch.

13. The combination with a series of gears, including a Shiite-ble gear,a clutch, means for operatiny said clutch, electricallycontrolled meansihr shifting the shitable gear operated by the clutch-operating means,including a reciprocable member attached to the gear, a neciprocablemember attached to the clutch-operating mechanism, means operated by anelectric current for connecting said reciprocable members together,comprising a series ot electro-magnets on one of said reciprocablemembers, armatures on ythe other oi? said members, push-button means forcontrolling the enerlgization of the electro-magnets, means w ereby theenergization of a magnet will .cause the armature on one of thereciprocable members to engage the other reciprocable member so thatwhen the clutch is operated in one direction to move the reciprocablemember connected therewith the rereciprocable member attached to lthegear will move in unison therewith, mechanical means for restoring thegear shifting mechanisml to its normal position, means for controllingthe electric current to the electroi connecting the said members to theshiftv rod.

In testimony whereof I have hereunto set 10 my hand in the presence oftwo subscribing Witnesses.

FRED HAROLD GIBSGN.

Witnesses:

JOHN H. HERRING, WALTER REIMERS.

